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Lubricating oil composition for refrigerators and method for lubrication with composition

A technology for lubricating oil composition and refrigerator, applied in lubricating compositions, chemical instruments and methods, petroleum industry, etc., can solve the problems of poor wear resistance, poor sealing performance, and the inability of long-term stable use of refrigerants

Inactive Publication Date: 2000-02-23
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the lubrication performance is not good, the wear resistance is not good, and the sealing material used in the refrigerant circulation system is deteriorated, so that the sealing performance of the system is deteriorated, and people worry that the refrigerant cannot be used stably for a long time

Method used

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  • Lubricating oil composition for refrigerators and method for lubrication with composition
  • Lubricating oil composition for refrigerators and method for lubrication with composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7 and proportion 1、2

[0075] (1) Lubricating oil composition for refrigerators

[0076] 70% (weight) of the refrigerant composed of a propane-isobutane mixture with a molar ratio of 1:1 and 30% (weight) of the base oil of the properties shown in Table 1 were mixed respectively to prepare Examples 1 to 7 and comparative Lubricating oil compositions for refrigerators of Examples 1 and 2. Using this lubricating oil composition for refrigerating machines, an actual machine test was carried out in the following manner to evaluate its performance. The results are shown in Table 1.

[0077] (2) Compressor refrigeration cycle mode

[0078] As the refrigerator, a compressor refrigeration cycle composed of a general "compressor-condenser-expansion valve-evaporator" is used. Among them, a capillary expansion valve can be used as the expansion valve.

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Abstract

A lubricating oil composition which comprises (A) a refrigerant comprising a hydrocarbon having 1 to 8 carbon atoms as the main component and (B) a base oil comprising a hydrocarbon exhibiting a degree of non-aromatic unsaturation of 10 % or below and a kinematic viscosity of 5 mm<2> / s or above at 100 DEG C or a polyalkylene glycol derivative represented by general formula (I): R<1>O-(PO)a-(EO)b-R<2> (wherein R<1> and R<2> are each independently hydrogen, C1-C10 alkyl or C2-C10 acyl; PO is oxypropylene; EO is oxyethylene; and a and b are positive numbers including 0 and satisfying the relationship: 2 / s at 100 DEG C. This composition can attain effective lubrication in compression refrigeration cycles wherein refrigerants comprising hydrocarbons as the main component are used, thus improving the wear resistance, stability, lubrication performance and sealing properties and refrigeration efficiency.

Description

technical field [0001] The present invention relates to a lubricating oil composition and a lubricating method for refrigerating machines, more specifically, to a lubricating oil composition for refrigerating machines using hydrocarbons having 1 to 8 carbon atoms as the main component of the refrigerant, and its use The method of lubrication of the composition. Background technique [0002] For example, in the compression refrigeration cycle of a compression refrigerator composed of a compressor, a condenser, an expansion valve, and an evaporator, the refrigerator is generally designed so that a mixed liquid of refrigerant and base oil circulates in the closed system. In such compression-type refrigerators, dichlorodifluoromethane (R-12) and chlorodifluoromethane (R-22) have been frequently used as refrigerants, and various mineral oils have been used as base oils. and synthetic oils. However, the above-mentioned chlorofluorocarbons such as R-12 and R-22 are worried about ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M101/02C09K5/04
CPCC10N2240/50C10N2220/02C10N2220/303C10N2240/52C10N2240/22C10N2240/58C10M2209/109C10M171/008C10M2209/1095C10N2240/30C10M2209/1075C10M2203/102C10M2209/107C10N2240/00C10M2209/108C10N2240/56C10N2240/54C09K5/042C10N2240/60C10N2240/66C10M2203/10C10M2209/1085C10N2220/022C10N2020/01C10N2020/103C10N2020/02C10N2040/00C10N2040/34C10N2040/30C10N2040/40C10N2040/38C10N2040/32C10N2040/42C10N2040/36C10N2040/44C10N2040/50C10M101/02
Inventor 永尾智半田丰和
Owner IDEMITSU KOSAN CO LTD
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